Sometimes I find that it's a matter of staying with the shot, particularly with high misses. Sometimes people put an extra little tug downward on the bowstring right as they release the arrow which causes the arrow to angle up. Other times the bow arm is not as solid as it should be and begins to rise as you expand rather than staying locked on target. What I mean by staying with the shot is to keep your head still and follow the arrow through your sight window all the way to the target, especially when you're shooting at an animal, which is when you're most likely to lose focus on your spot in the moment before release. If you get in the habit of watching the arrow through the sight window all the way to the target it will be obvious to you if you do either of the things I mentioned because you will notice the arrow begin to drift off target and can stop the shot.
I would vote for reading this post a couple times… Follow through is a huge thing.
I’ve seen some very good archers that just fall apart in front of game and have the same experience you are having. Their adrenaline starts pumping and they are holding their breath and shaking like a leaf. Typically the shot was rushed and results were not predictable.
I’ve seen other archers who were “peeking” and dropped their bow arm or moved it to the side to watch the arrow fly. These guys had problems on the 3 D course as well as hunting.
I helped a few archers with this by using a piece of string. Put one end of the string on the shelf of the bow and hold it there lightly with your bow hand. Then take the other end and put it between your fingers like you would place on your fingers on the arrow on the string, Now simulate coming
to full draw to your anchor point letting the string slide though your bow hand over the rest. You are not drawing the bow string at all, but simply keeping the string between your anchor point and the bow tight, And holding it there while looking down the string though the sight window at your target.
Looking down this string is what guides your arrow to the point of impact. So when you go back to shooting arrows pretend you still have that string attached to your fingers at anchor.
What this does is let you imagine guiding your arrow to the target with your bow arm and using the string in your hand still at anchor to hold it on target….
Of course you cannot do this and actually shoot arrows. But it sets you up for maintaining your form and follow through just holding that imaginary string tight and guiding your arrow.
It’s actually a pretty amazing drill that helps develop consistent back tension though the shot too. Ive used this string drill to train kids to shoot sucsessfully too.
As far as how to pick a spot goes… I’ve always used that front leg and shoulder blade location to focus on. As the deer is walking I’m watching that shoulder blade going forward and back and pick the spot at the tip of the should blade to focus on. I want that shoulder blade forward at the precise moment of release and wait for it.
Sometimes the shot develops, sometimes it doesn’t. Kirk